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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 92 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (1 Of 3)) >> Diagnostic Information and Procedures >> DTC P026A >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

  1. Check the engine cooling system and front of the vehicle to verify that none of the conditions listed below exist:
    • Obstruction of the grille
    • Debris in the radiator, condenser, or CAC fins

      Refer to Radiator Cleaning .

    • Bent radiator, condenser, or CAC fins
    • Engine overheating

      Refer to Engine Overheating .

    • If a condition exists 

      Repair or replace as appropriate.

    • Go to next step: If no condition exists 
  2. Replace the Charge Air Cooler.
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